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In Perl, the qw() operator takes a series of strings seperated by white space and returns them so they may be treated as if they were in quotes. Example:

qw(one two three)
is the same as
("one","two","three").

Note
Do not use commas between the arguements(e.g. qw(one,two,three)). It doesn't work properly.

See also qw//.

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